To Restore the Default Location for Grips in a Dynamic Block Definition

Click Insert tab Block Definition panel Block Editor. Find
In the Edit Block Definition dialog box, select the block whose grips you want to modify.
In the Block Editor, at the Command prompt, enter BGRIPSET.
Select the grip for which you want to reset the grip position(s).
At the Command prompt, enter r for Reposition.
Click Block Editor tab Open/Save panel Save Block. Find
(Optional) If you are finished using the Block Editor, click Close Block Editor.